The Nervous System

Question 1

The Nervous System- Definition

Answer 1

Made up of the brain and the spinal cord
The PNS (peripheral nervous system) relays messages from the environment to the CNS, via sensory neurone and from the CNS to effectors, via motor neurone

Question 2

PNS

Answer 2

ANS- autonomic nervous system
controls involuntary, vital functions of the body, such as maintaining heart rates and breathing rates

SANS- somatic nervous system
receives information from sensory receptors belonging to each of the 5 senses, and results in effectors being stimulated by the CNS, via motor neurons

Question 3

Subdivides of the ANS

Answer 3

Sympathetic

Parasympathetic

They work as part of an antagonistic pair during the ‘rest and digest’ response and are crucial in producing the physiological arousal needed to maintain the fight or flight response

Question 4

Sympathetic Nervous System

Answer 4

increased heart rate, breathing rate, vasoconstriction, pupil dilation

Question 5

Parasympathetic Nervous System

Answer 5

decreases heart rate, breathing rates, causes vasodilation and pupil constriction